Chapter 8 Mid-Chapter Checkpoint

Write an equation for the word sentence.

The sum of a number and 4.5 is 8.2.

• n = 4.5 + 8.2

• n + 4.5 = 8.2

• n x 4.5 = 8.2

• n = 4.5 x 8.2

Write an equation for the word sentence.

Three times the cost is $24.

• 3/c = 24

• 3 x 24 = c

• 24c = 3

• 3c = 24

Determine whether the given value of the variable is a solution of the equation.

x - 24 = 58; x = 82

• Yes, it is a solution of the equation.

• No, it is not a solution of the equation.

Determine whether the given value of the variable is a solution of the equation.

 $\frac{1}{3}$ c =  $\frac{3}{8}$ ; c = $\frac{3}{4}$  

• Yes, it is a solution of the equation. 

• No, it is not a solution of the equation. 

Solve the equation by using inverse operations.

a + 2.4 = 7.8

Solve the equation by using inverse operations.

*Use the / sign to show a fraction 

b - $\frac{1}{4}$ = 3 $\frac{1}{2}$  

Solve the equation by using inverse operations.

3x = 27

Solve the equation by using inverse operations.

*Use the / sign to show a fraction. 
 $\frac{1}{3}$ s = $\frac{1}{5}$  

Solve the equation by using inverse operations.

 $\frac{t}{4}$ = 16

Solve the equation by using inverse operations.

 $\frac{w}{7}$ = 0.3